The Screw,close Tolerance, cataloged under National Stock Number 5305-00-083-2143, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-083-2143 |
| Primary Part Number | 72791H3A6 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 0.595 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | SPS-P-671,50392 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.210 INCHES MINIMUM AND 0.277 INCHES MAXIMUM IN |
| Hardness Rating | 50.0 ROCKWELL C NOMINAL OVERALL |
| Material Document and Classification | AMS6485 FED SPEC 1ST MATERIAL RESPONSE OR AMS6487 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1894 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.325 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 72791H3A6 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| GB510AD3A6 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 72791H3A6 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-00-083-2143 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-083-2143 has 1 manufacturer part number on file: 72791H3A6 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 72791H3A6: Fastener Length: 0.595 INCHES MINIMUM AND 0.642 INCHES MAXIMUM IN; Surface Treatment Document and Classification: SPS-P-671,50392 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.210 INCHES MINIMUM AND 0.277 INCHES MAXIMUM IN; Hardness Rating: 50.0 ROCKWELL C NOMINAL OVERALL. 19 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.