The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-633-4049, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-633-4049 |
| Primary Part Number | 12577735-1 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Width Across Flats | 1.282 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633,TY VI,SC2,0.3 MILS THICK ASSN STD SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS |
| Thread Series | UNF |
| Hardness Rating | 28.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | ASTM A322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Height | 0.605 INCHES MINIMUM AND 0.621 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL EXCEPT THREADS |
| Inside Width Across Flats | 1.282 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN |
| Nut Style | INTERNAL OR EXTERNAL WRENCHING HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4130 OR STEEL COMP 4135 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145 OR STEEL COMP 4330 OR STEEL COMP 4337 OR STEEL COMP 4340 OR STEEL COMP 8630 OR STEEL COMP 8635 OR STEEL COMP 8637 OR STEEL COMP 8640 OR STEEL COMP 8642 OR STEEL COMP 8645 OVERALL |
| Bearing Surface Type | FLAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 12577735-1 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12577735 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 5310-01-633-4049 is a Nut,plain,hexagon, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-633-4049 has 1 manufacturer part number on file: 12577735-1 (U S Army Tank Automotive Command Amsta-Im-Mm).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-633-4066, 5310-01-734-9695. Verify interchangeability with system specifications before substitution.
Key specifications for 12577735-1: Width Across Flats: 1.282 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633,TY VI,SC2,0.3 MILS THICK ASSN STD SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS; Thread Series: UNF; Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM. 15 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.