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Technical Data Sheet
PartsTable / COMPONENT / GM8
GM8 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include material: STEEL OVERALL, unit_type: OPTICAL, construction: TUBULAR, overall_width: 4.500 INCHES NOMINAL IN, image_position: ERECT, overall_height: 11.300 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-278-2070, 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
GM8
NSN: 4730-00-278-2070
FSC: 4730
CAGE: 66295 — WITTEK COMPANIES INTL INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
unit_typeOPTICAL
constructionTUBULAR
overall_width4.500 INCHES NOMINAL IN
image_positionERECT
overall_height11.300 INCHES NOMINAL IN
removable_lensNOT INCLUDED
viewing_methodREFLECTED
inside_diameter0.875 INCHES NOMINAL IN
overall_diameter5.800 INCHES NOMINAL IN
viewing_positionEYE LEVEL
surface_treatmentCADMIUM OR ZINC OVERALL
NSN4730-00-278-2070
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: GM8 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
INSIDE DIAMETER: 0.875 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DIAMETER0.875 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
K335Interchangeable
interchangeable cross-reference
interchangeable
335Interchangeable
interchangeable cross-reference
interchangeable
200241Interchangeable
interchangeable cross-reference
interchangeable
110 7/32Interchangeable
interchangeable cross-reference
interchangeable
B94.11MInterchangeable
interchangeable cross-reference
interchangeable
C12075Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GM8?
GM8 is a FILTER,RADIO FREQUENCY INTERFERE.
What parts can replace GM8?
There are 27 known substitutes for GM8: K335, 335, 200241 and 24 more. Substitute compatibility should be verified for your specific system.
Is GM8 still available?
GM8 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026