Shop By Product Matching "National"
Choose your Engine for your 1981 Chevrolet K20
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- Differential Pinion Seal
- with 10.5 (in) Ring Gear with GMC Axle
- National 2286 Differential Pinion Seal
- Product Attributes:
- Shaft (Inch): 2.201
- Width (Inch): 0.590
- Redicoat: Yes
- Flanged Outside Diameter (Inch): 3.970
- Inside Diameter:
- 2.201
- 55.910
- Flanged Outside Diameter (MM): 100.838
- Unit of Dimension: Inch
- Housing Bore (Inch): 3.519
- Outside Diameter:
- 3.523
- 89.480
- Outside Diameter (Inch): 3.523
- Shaft (MM): 55.910
- Part Description: Oil Seal
- National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
This Part Fits the Following OEM/Substitute Numbers:
12305328, 21955, 2286, 26004811, 292-128, 3977359, 4321955, 47530, N21955, YMS2286
Additional Fitment Information:
| Vehicle | Position |
|---|---|
| 1981 - Chevrolet K20 | Rear Outer |
- Taper Bearing Set
- Taper Bearing Set Includes Cup and Cone with 10.5 (in) Ring Gear
- National A-38 Taper Bearing Set
- Product Attributes:
- Cone Radius (MM): 3.5560
- Width (Inch): 0.8500
- Cone Length (Inch): 0.8750
- Cone Bore (MM): 50.8000
- Cone Length (MM): 25.9080
- Cup Radius (MM): 1.2700
- Standout (MM): 0.5080
- Taper Bearing Cone: Lm104949
- Cone Bore (Inch): 2.0000
- Cone Radius (Inch): 0.1400
- Cup Length (Inch): 0.6500
- Cup Bore (Inch): 3.2500
- Standout (Inch): 0.0200
- Taper Bearing Cup: Lm104911
- Cup Radius (Inch): 0.0500
- Cup Bore (MM): 82.5500
- Part Description: Taper Bearing Set
- Manufactured with premium-grade steel, National® taper bearing sets feature crowned raceways and rollers to ensure even load distribution.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
This Part Fits the Following OEM/Substitute Numbers:
02955374, 2852729, 2955374, 364464C91, 431669C91, 46AX90, 7451812, 9428908, A-38, A38, BR38, FS38, NO38SET, S38, S87, S87A, SET38
Additional Fitment Information:
| Vehicle | Position |
|---|---|
| 1981 - Chevrolet K20 | Rear Outer |
- Needle Bearing
- with New Process 208 Transfer Case with Part Time 4WD 2 Speed
- National B-5020 Needle Bearing
- Product Attributes:
- Width (Inch): 0.7860
- Shaft Diameter Min (MM): 49.9897
- Housing Diameter Min (MM): 57.9679
- Shaft Diameter Max (Inch): 1.9700
- Shaft Diameter Min (Inch): 1.9681
- Shaft Diameter Max (MM): 50.0380
- Housing Diameter Max (MM): 57.9857
- Bore (Inch): 2.0000
- Housing Diameter Min (Inch): 2.2822
- Housing Diameter Max (Inch): 2.2829
- Outside Diameter (Inch): 2.3750
- Part Description: Needle Bearing
- Manufactured with premium materials, National® needle bearings are designed and engineered to meet OE specifications.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
This Part Fits the Following OEM/Substitute Numbers:
04167928, 04269185, 04338620, 05740506, 12473232, 12547173, 15579805, 15581918, 4137737, 4167928, 4269185, 4338620, 52114384AA, 52114384AB, 565983, 8130868, 8134215, 9439593...VIEW MORE
Additional Fitment Information:
| Vehicle | Drive Type |
|---|---|
| 1981 - Chevrolet K20 | 4WD |
- Needle Bearing
- with 8.5 (in) Ring Gear with GMC Axle Bearing Only
- National B-2110 Needle Bearing
- Product Attributes:
- Width (Inch): 0.6250
- Shaft Diameter Min (MM): 33.3248
- Housing Diameter Min (MM): 41.2623
- Shaft Diameter Max (Inch): 1.3125
- Shaft Diameter Min (Inch): 1.3120
- Shaft Diameter Max (MM): 33.3375
- Housing Diameter Max (MM): 41.2877
- Bore (Inch): 1.3125
- Housing Diameter Min (Inch): 1.6245
- Housing Diameter Max (Inch): 1.6255
- Outside Diameter (Inch): 1.6250
- Part Description: Needle Bearing
- Manufactured with premium materials, National® needle bearings are designed and engineered to meet OE specifications.
This Part Fits the Following OEM/Substitute Numbers:
04746127, 05080499AA, 3634724, 3965121, 4746127, 5080499AA, 550759, 550759-1, 565921, 610466R91, 8121402, 88996465, B2110, C6TZ-3123A, FB2110, J8121402, SCE2110, ZZL0-26-151...VIEW MORE
Additional Fitment Information:
| Vehicle | Position |
|---|---|
| 1981 - Chevrolet K20 | Front Inner |
- Taper Bearing Cone
- National LM104949 Taper Bearing Cone
- Product Attributes:
- Cone Bore (Inch): 2.0000
- Cone Radius (Inch): 0.1400
- Cone Radius (MM): 3.5560
- Cone Length (Inch): 0.8750
- Cone Bore (MM): 50.8000
- Cone Length (MM): 25.9080
- Part Description: Taper Bearing Cone
- Manufactured with premium-grade steel, National® taper bearing cones feature crowned raceways and rollers to ensure even load distribution.
-
Suggested Purchase Quantity: 2
- Most jobs typically require 2 of this item.
This Part Fits the Following OEM/Substitute Numbers:
05086772AA, 127540, 2825729, 2852729, 2953550, 364463C91, 431668C91, 5086772AA, 5357401, 565905, 565911, 591651C91, 70929742, 709297428, 7451814, 8128841, 929742, 9428909...VIEW MORE
Additional Fitment Information:
| Vehicle | Position |
|---|---|
| 1981 - Chevrolet K20 | Front Inner |
- Man Transmission Input Shaft Seal
- National 3638 Man Transmission Input Shaft Seal
- Product Attributes:
- Inside Diameter:
- 1.125
- 28.580
- Shaft (Inch): 1.125
- Helix Type: Clockwise-spiral Lip Design
- Width (Inch): 0.190
- Unit of Dimension: Inch
- Housing Bore (Inch): 1.624
- Outside Diameter:
- 1.628
- 41.350
- Outside Diameter (Inch): 1.628
- Redicoat: Yes
- Shaft (MM): 28.580
- Part Description: Oil Seal
- Inside Diameter:
- National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
This Part Fits the Following OEM/Substitute Numbers:
04273275, 04792317AB, 11111, 11122, 11417, 2603865, 3638, 376761, 4273275, 4792 317, 4792317AB, 48012, 48061, 8124881, 8125718, 8127391, 8133528, C9AR7A283AA...VIEW MORE
Additional Fitment Information:
| Vehicle | Transmission | Trans. Speed | Transmission Manuf. Code |
|---|---|---|---|
| 1981 - Chevrolet K20 | Manual | 3 | 162T |
- Spindle Bearing and Seal Kit
- Spindle Bearing and Seal Kit with 8.5 (in) Ring Gear with GMC Axle
- National SBK-1 Spindle Bearing and Seal Kit
- The National® bearing and seal kit includes all the components required to complete the repair.
This Part Fits the Following OEM/Substitute Numbers:
4210968, 706527X, 8127356, BK1, E3TZ-3C076A, FSBK1, FWK1, J8127356, SBK1
Additional Fitment Information:
| Vehicle | Position |
|---|---|
| 1981 - Chevrolet K20 | Front Inner |
- Oil Seal
- Dual Lip Style with New Process 208 Transfer Case with Part Time 4WD 2 Speed
- National 710928 Oil Seal
- Product Attributes:
- Inside Diameter:
- 1.938
- 49.230
- Shaft (Inch): 1.938
- Sealing Material: Polyacrylate
- Width (Inch): 0.500
- Unit of Dimension: Inch
- Housing Bore (Inch): 2.680
- Outside Diameter:
- 2.685
- 68.200
- Outside Diameter (Inch): 2.685
- Shaft (MM): 49.230
- Part Description: Oil Seal
- Inside Diameter:
- National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
This Part Fits the Following OEM/Substitute Numbers:
04167929, 04798033, 05740017, 13121, 13672, 14095609, 19255, 21217, 335196, 4057006, 4167929, 4269183, 47898, 4798033, 49646, 5359457, 5740017, 710928...VIEW MORE
Additional Fitment Information:
| Vehicle | Drive Type |
|---|---|
| 1981 - Chevrolet K20 | 4WD |
- Oil Seal
- National 8792S Oil Seal
- Product Attributes:
- Inside Diameter:
- 0.500
- 12.700
- Shaft (Inch): 0.500
- Sealing Material: Nitrile
- Width (Inch): 0.192
- Unit of Dimension: Inch
- Housing Bore (Inch): 0.751
- Outside Diameter:
- 0.756
- 19.200
- Outside Diameter (Inch): 0.756
- Shaft (MM): 12.700
- Part Description: Oil Seal
- Inside Diameter:
- National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
This Part Fits the Following OEM/Substitute Numbers:
011633, 12304285, 2398409, 24-10-1-218-852, 24-50-1-423-606, 24101218852, 293-65, 47399, 480050, 8623056, 8657163, 8792S, 96040528, A65502S, AH10888, B29915, B37248, N4912...VIEW MORE
Additional Fitment Information:
| Vehicle | Transmission | Trans. Speed | Transmission Manuf. Code |
|---|---|---|---|
| 1981 - Chevrolet K20 | Automatic | 3 | THM400 |
- Oil Seal
- with GMC THM350 Transmission
- National 8792S Oil Seal
- Product Attributes:
- Inside Diameter:
- 0.500
- 12.700
- Shaft (Inch): 0.500
- Sealing Material: Nitrile
- Width (Inch): 0.192
- Unit of Dimension: Inch
- Housing Bore (Inch): 0.751
- Outside Diameter:
- 0.756
- 19.200
- Outside Diameter (Inch): 0.756
- Shaft (MM): 12.700
- Part Description: Oil Seal
- Inside Diameter:
- National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
Additional Fitment Information:
| Vehicle | Transmission | Trans. Speed |
|---|---|---|
| 1981 - Chevrolet K20 | Automatic | 3 |
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