The Screw,close Tolerance, cataloged under National Stock Number 5305-01-055-2833, 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 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-055-2833 |
| Primary Part Number | 121558-3-A8P |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 0.848 INCHES MINIMUM AND 0.878 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.338 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| 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 | 0.258 INCHES MINIMUM AND 0.305 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 |
|---|---|
| 121558-3-A8P PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| C7985-3-8 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| C7985-3-8 PRIMARY | Huck International, Inc (USA) |
| C7985-3-8 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VT1694F3-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| C7985-3-8 PRIMARY | Saturn Fasteners Inc (USA) |
| H185-3-8 PRIMARY | Huck International, Inc (USA) |
| PBF1166-3-8 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| C7985-3-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| C7985-3-8 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| AIC985-3-8P | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| VT1694F3-8 | 5/9 Secondary reference U.S. Government activity |
| 5305PL0759630 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 121558-3-A8P | 5/9 Secondary reference U.S. Government activity |
| AIC985-3-8 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| C7985-3-8 | 3/2 Design control — primary reference U.S. Government activity |
| 121558-3-A8P | 3/2 Design control — primary reference U.S. Government activity |
| C7985-3-8 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5305-01-055-2833 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-055-2833 has 10 manufacturer part numbers on file: 121558-3-A8P (Sps Technologies, Llc Dba PB Fasteners), C7985-3-8 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), C7985-3-8 (Huck International, Inc), C7985-3-8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), VT1694F3-8 (Howmet Global Fastening Systems Inc) and 5 more.
Key specifications for 121558-3-A8P: Fastener Length: 0.848 INCHES MINIMUM AND 0.878 INCHES MAXIMUM IN; Surface Treatment Document and Classification: NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.338 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM 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.