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121741 — SWITCH,THERMOSTATIC

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

121741: SWITCH,THERMOSTATIC.

The SWITCH,THERMOSTATIC is a the manufacturer industrial component. Key specifications include height: 0.094 INCHES NOMINAL IN, diameter: 0.312 INCHES NOMINAL IN, material: STEEL COMP 1010 OR STEEL COMP B1111 OVERALL, head_style: FLAT, body_height: 3.812 INCHES NOMINAL IN, thread_class: 2A ALL BOLT A. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-012-1741, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MRO→ MRO_GENERAL→ 121741
NSN: 5315-00-012-1741
NIINs: 000121741, 008347805, 009147406, 011670030, 013533036
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 12204 — CHRYSLER REALTY COMPANY LLC DBA DAIMLER CHRYSLER (USA)
SPECIFICATIONS
height0.094 INCHES NOMINAL IN
diameter0.312 INCHES NOMINAL IN
materialSTEEL COMP 1010 OR STEEL COMP B1111 OVERALL
head_styleFLAT
body_height3.812 INCHES NOMINAL IN
thread_class2A ALL BOLT A
overall_width2.375 INCHES NOMINAL IN
terminal_typeSCREW
chamfer_length0.078 INCHES NOMINAL IN
overall_height8.281 INCHES NOMINAL IN
overall_length2.906 INCHES NOMINAL IN
mounting_methodBOLT AND THREADED BUSHING
NSN5315-00-012-1741
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 121741 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CHAMFER LENGTH: 0.078 INCHES NOMINAL IN
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
•
UNDER HEAD LENGTH: 0.969 INCHES NOMINAL IN
•
PIN CHAMFER ANGLE: 15.0 DEGREES NOMINAL
•
FIRST HOLE DIAMETER: 0.1094 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT
•
PIN HEAD DIAMETER: 0.438 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
TECHNICAL CHARACTERISTICS
CHAMFER LENGTH0.078 INCHES NOMINAL IN
HOLE ARRANGEMENT STYLEONE END DRILLED
UNDER HEAD LENGTH0.969 INCHES NOMINAL IN
PIN CHAMFER ANGLE15.0 DEGREES NOMINAL
FIRST HOLE DIAMETER0.1094 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT
PIN HEAD DIAMETER0.438 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC ALL MATERIAL RESPONSES OVERALL
DIAMETER0.312 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED
SUBSTITUTES & CROSS-REFERENCES 2
7393197Reference document
Same NSN cross-reference
Reference document — Secondary reference
1A2457Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 121741?
121741 is a SWITCH,THERMOSTATIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace 121741?
There are 2 known substitutes for 121741: 7393197, 1A2457. Substitute compatibility should be verified for your specific system.
What is the NSN for 121741?
121741 is cataloged in the U.S. Government catalog under NSN 5315-00-012-1741. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.