The Screw,close Tolerance, cataloged under National Stock Number 5305-01-723-5487, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-723-5487 |
| Primary Part Number | 3M927-6L21 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.9385 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ION VAPOR DEPOSITED ALUMINUM PER MIL-DTL-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.641 INCHES NOMINAL IN |
| Material Document and Classification | INCO 718 PER AMS 5662 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.3025 INCHES MINIMUM AND 1.3225 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 125000 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 | 24 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.564 INCHES NOMINAL 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 |
|---|---|
| HT4069-6-21A | Howmet Global Fastening Systems Inc (USA) |
| 3M927-6L21 | Camcar Llc Div Camcar Llc (USA) |
| 3M927-6L21 | Heartland Precision Fasteners Inc (USA) |
| HT4069-6-21A | Huck International, Inc (USA) |
| HT4069-6-21A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| WC4069-6-21 | West Coast Aerospace, Inc. (USA) |
| 3M927-6L21 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M927-6L21 PRIMARY | The Boeing Company Div Defense (USA) |
| 11885-6L21 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M927-6L21 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M927-6L21 | Linread Ltd (GBR) |
| 3M927-6L21 | Saturn Fasteners Inc (USA) |
| HT4069-6-21A | Hi-Shear Corporation (USA) |
| HT4069-6-21A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 3M927-6L21 | Houston Precision Fasteners I Lp (USA) |
| HT4069-6-21A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HT4069-6-21A | 5/2 Secondary reference U.S. Government activity |
| HT4069-6-21A | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-723-5487 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-723-5487 has 16 manufacturer part numbers on file: HT4069-6-21A (Howmet Global Fastening Systems Inc), 3M927-6L21 (Camcar Llc Div Camcar Llc), 3M927-6L21 (Heartland Precision Fasteners Inc), HT4069-6-21A (Huck International, Inc), HT4069-6-21A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 11 more.
Key specifications for 3M927-6L21: Fastener Length: 1.9385 INCHES MINIMUM AND 1.9685 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ION VAPOR DEPOSITED ALUMINUM PER MIL-DTL-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.641 INCHES NOMINAL IN; Material Document and Classification: INCO 718 PER AMS 5662 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE 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.