The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-168-7302, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-168-7302 |
| Primary Part Number | H39991-6 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — No Item Name Available |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Material Document and Classification | AMS 6370 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.375 INCHES IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| Thread Quantity Per Inch | 24 |
| Surface Treatment | CADMIUM OVERALL |
| Width Across Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Washer Outside Diameter | 0.598 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Class | 3B |
| Nut Style | HEXAGON |
| Washer Thickness | 0.060 INCHES NOMINAL IN |
| Material | STEEL COMP 4130 OVERALL |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| H16-6 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| 5310PL2026292 | Jednolity Indeks Materialowy - Uniform Material Index (POL) |
| H39991-6 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 672268 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| H16-6 | Howmet Global Fastening Systems Inc (USA) |
NSN 5310-00-168-7302 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310 (No Item Name Available). Status: active.
NSN 5310-00-168-7302 has 5 cross-referenced part numbers: H16-6 (Leonardo Spa Helicopters Division - Production Site), 5310PL2026292 (Jednolity Indeks Materialowy - Uniform Material Index), H39991-6 (Howmet Global Fastening Systems Inc), 672268 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), H16-6 (Howmet Global Fastening Systems Inc).
There are 2 known substitutes for 5310-00-168-7302: 5950-00-764-2514, 5950-00-789-9415. Verify interchangeability with system specifications before substitution.
Key specifications for H39991-6: Material Document and Classification: AMS 6370 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Size: 0.375 INCHES IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM. 16 total characteristics are documented in the Federal Logistics Information System.