PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50121Setscrew

Nylok Llc · NSN 5305-00-832-9849 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-00-832-9849 — this item is cataloged by the U.S. Government under National Stock Number 5305-00-832-9849. Primary manufacturer part number: 50121.
Features
  • Setscrew — FSC 5305
  • Head Style: HEADLESS (SETSCREW)
  • Thread Direction: RIGHT-HAND
  • Material Document and Classification: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
  • Material: STEEL COMP 631 FASTENER
  • Locking Feature: STRIP THREADS
  • Thread Quantity Per Inch: 40
  • Internal Drive Style: SLOT
Applications
  • Applications requiring Steel Comp 631 Fastener construction
General Description

The Setscrew, cataloged under National Stock Number 5305-00-832-9849, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Nylok Llc. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 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
NSN5305-00-832-9849
Primary Part Number50121
Item NameSetscrew
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerNylok Llc
StatusACTIVE
Head StyleHEADLESS (SETSCREW)
Thread DirectionRIGHT-HAND
Material Document and ClassificationAMS 5643 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
MaterialSTEEL COMP 631 FASTENER
Locking FeatureSTRIP THREADS
Thread Quantity Per Inch40
Internal Drive StyleSLOT
Surface Treatment Document and ClassificationMIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE FASTENER
Surface TreatmentPASSIVATE FASTENER
Nominal Thread Diameter0.112 INCHES IN
Point StyleDOG
Point Diameter0.082 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN
MaterialPLASTIC LOCKING FEATURE
Point Length0.315 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Thread Length0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM IN
Thread Class2A A
Fastener Length0.445 INCHES MINIMUM AND 0.455 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3120-00-173-02484980649 INTERCHANGEABLE
Bearing,sleeve
Agco Corp Parts Opn
5365-00-275-6021481550PC3 INTERCHANGEABLE
Ring,externally Threaded
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5330-00-286-7060450121 INTERCHANGEABLE
Seal,plain Encased
Federal-Mogul Corp Government Sales Dept
3020-00-351-7882SMB171501 INTERCHANGEABLE
Gear,spur
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5945-00-879-7147A728 INTERCHANGEABLE
Solenoid,electrical
Te Connectivity Corporation
5310-01-020-1233501-21 INTERCHANGEABLE
Nut,scissors Lift Assembly
Dana Corp Mobile Fluid Products Div
5895-01-138-3483 INTERCHANGEABLE
Detector Assy
5961-01-149-4869 INTERCHANGEABLE
Semiconductor Device,diode
4210-01-363-377050121 INTERCHANGEABLE
Manifold,suction
Fire-Bann Corp Lrd
5120-01-430-623918B INTERCHANGEABLE
Punch,center,automatic
L.s. Starrett Company (the) Div Tool Division
Cross-Reference Index
Part NumberManufacturer
50121 Butler, Inc Dba Butler Inc (USA)
CC-4143-01 Conax Florida Corporation (USA)
5305PL1697428 Jednolity Indeks Materialowy - Uniform Material Index (POL)
5305PL0735733 Jednolity Indeks Materialowy - Uniform Material Index (POL)
122-10935-3 H Koch & Sons Co (USA)
CC-4143 Conax Florida Corporation (USA)
50121 Torkon Fastener Corp (USA)
50121 PRIMARY Nylok Llc (USA)
Related Parts
3120-00-173-0248INTERCHANGEABLE
BEARING,SLEEVE
4980649
5365-00-275-6021INTERCHANGEABLE
RING,EXTERNALLY THREADED
481550PC3
5330-00-286-7060INTERCHANGEABLE
SEAL,PLAIN ENCASED
450121
3020-00-351-7882INTERCHANGEABLE
GEAR,SPUR
SMB171501
5945-00-879-7147INTERCHANGEABLE
SOLENOID,ELECTRICAL
A728
5310-01-020-1233INTERCHANGEABLE
NUT,SCISSORS LIFT ASSEMBLY
501-21
5895-01-138-3483INTERCHANGEABLE
DETECTOR ASSY
5961-01-149-4869INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
4210-01-363-3770INTERCHANGEABLE
MANIFOLD,SUCTION
50121
5120-01-430-6239INTERCHANGEABLE
PUNCH,CENTER,AUTOMATIC
18B
5998-01-454-6442INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
5360-01-471-6262INTERCHANGEABLE
SPRING,HELICAL,TORSION
50121

Frequently Asked Questions

What is NSN 5305-00-832-9849?

NSN 5305-00-832-9849 is a Setscrew, manufactured by Nylok Llc, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-00-832-9849?

NSN 5305-00-832-9849 has 8 cross-referenced part numbers: 50121 (Butler, Inc Dba Butler Inc), CC-4143-01 (Conax Florida Corporation), 5305PL1697428 (Jednolity Indeks Materialowy - Uniform Material Index), 5305PL0735733 (Jednolity Indeks Materialowy - Uniform Material Index), 122-10935-3 (H Koch & Sons Co) and 3 more.

What NSN replaces 5305-00-832-9849?

There are 12 known substitutes for 5305-00-832-9849: 3120-00-173-0248, 5365-00-275-6021, 5330-00-286-7060 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 50121?

Key specifications for 50121: Head Style: HEADLESS (SETSCREW); Thread Direction: RIGHT-HAND; Material Document and Classification: AMS 5643 ASSN STD SINGLE MATERIAL RESPONSE FASTENER; Material: STEEL COMP 631 FASTENER. 18 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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