PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

LL57M40S7Screw,cap,socket Head

Long-Lok, Llc · NSN 5305-01-045-9550 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-045-9550 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-045-9550. Primary manufacturer part number: LL57M40S7.
Features
  • Screw,cap,socket Head — FSC 5305
  • Thread Quantity Per Inch: 40
  • Thread Length: 0.355 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
  • Head Diameter: 0.223 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
  • Head Height: 0.056 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
  • Thread Direction: RIGHT-HAND
  • Head Style: BINDING
  • Thread Class: 2A A
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 301 or Steel Comp 302 or Steel Comp 304 Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-045-9550, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Long-Lok, Llc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-045-9550
Primary Part NumberLL57M40S7
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerLong-Lok, Llc
StatusACTIVE
Thread Quantity Per Inch40
Thread Length0.355 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
Head Diameter0.223 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
Head Height0.056 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Head StyleBINDING
Thread Class2A A
Fastener Length0.405 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
Nominal Thread Diameter0.112 INCHES IN
MaterialSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 304 OVERALL
Internal Drive StyleSLOT
Surface TreatmentPASSIVATE OVERALL
Locking FeatureSTRIP THREADS
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
2920-00-134-7716956-4704 INTERCHANGEABLE
Switch,lock,ignition
Cole Hersee Company
3220-00-204-245531-120 INTERCHANGEABLE
Sander,disk
Major Corp
5136-00-239-27643507 INTERCHANGEABLE
Die,thread Cutting
Stanley Tools Div of Stanley Works
5306-00-586-084400543 INTERCHANGEABLE
Bolt,ring
Defense Logistics Agency Dba Defense Supply Center Philadelphia
3020-00-804-7049 INTERCHANGEABLE
Gear,drive Motion
5935-00-817-3214 INTERCHANGEABLE
Connector,receptacle,electrical
5330-00-932-479255107 INTERCHANGEABLE
Gasket
Flowserve Inc
4320-00-969-024031-10-5 INTERCHANGEABLE
Ring,lantern
Carver Pump Company
4320-01-037-8775431105-001 INTERCHANGEABLE
Seal Assembly,shaft,spring Loade
Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
5330-01-123-55922B1-00117-2 INTERCHANGEABLE
Gasket
Lake Shore Systems, Inc.
Cross-Reference Index
Part NumberManufacturer
31105 Bowmar Llc Dba Bowmar Instrument Corp (USA)
LL57M40S7 PRIMARY Long-Lok, Llc (USA)
Related Parts
2920-00-134-7716INTERCHANGEABLE
SWITCH,LOCK,IGNITION
956-4704
3220-00-204-2455INTERCHANGEABLE
SANDER,DISK
31-120
5136-00-239-2764INTERCHANGEABLE
DIE,THREAD CUTTING
3507
5306-00-586-0844INTERCHANGEABLE
BOLT,RING
00543
3020-00-804-7049INTERCHANGEABLE
GEAR,DRIVE MOTION
5935-00-817-3214INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5330-00-932-4792INTERCHANGEABLE
GASKET
55107
4320-00-969-0240INTERCHANGEABLE
RING,LANTERN
31-10-5
4320-01-037-8775INTERCHANGEABLE
SEAL ASSEMBLY,SHAFT,SPRING LOADE
431105-001
5330-01-123-5592INTERCHANGEABLE
GASKET
2B1-00117-2
4320-01-178-5824INTERCHANGEABLE
PLATE,WEAR,ROTARY PUMP
31105
4140-01-229-2088INTERCHANGEABLE
IMPELLER,FAN,CENTRIFUGAL

Frequently Asked Questions

What is NSN 5305-01-045-9550?

NSN 5305-01-045-9550 is a Screw,cap,socket Head, manufactured by Long-Lok, Llc, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-045-9550?

NSN 5305-01-045-9550 has 2 cross-referenced part numbers: 31105 (Bowmar Llc Dba Bowmar Instrument Corp), LL57M40S7 (Long-Lok, Llc).

What NSN replaces 5305-01-045-9550?

There are 12 known substitutes for 5305-01-045-9550: 2920-00-134-7716, 3220-00-204-2455, 5136-00-239-2764 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of LL57M40S7?

Key specifications for LL57M40S7: Thread Quantity Per Inch: 40; Thread Length: 0.355 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN; Head Diameter: 0.223 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN; Head Height: 0.056 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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