M38 SEMS screws

[wesk]

Great trick question! Did I get it right?

All except the first sentence, I knew the link's complete description before I posted above.

I explained in my post above that the link's description is a good match for our 425380 hex bolt but since the rest of the original

7372885 screw, int-teeth-lock washer, hex-hd, S, cd or zn-pltd, 1/4-20NC x 5/8 (superseded by BOLT, H101-0425380)

which normally is the description of a hex head bolt with a common slot or phillip's head drive.

Since none of us appears to have a guaranteed original 7372885 screw we cannot be sure what the original screw looked like.

I did survey all the illustrations in TM 9-804 dated Sep 1950 and most of your list of original 7372885 screws did not show any screw driver common slots or phillip's drive indents. So it is quite possible the screw in the link may be useable for the 2372885 screws as well.

[RonD2]

Wes,
Sorry, I missed your point. I get it now.

Perhaps somebody that's convinced they have originals will snap a photo or two for us and use his micrometer to confirm the dimensions.

Thanks!

[wesk]

SEMS is also an impressive acronym!

Acronym Definition
SEMS Sun, Earth, Moon System
SEMS Self-Expandable Metallic Stent
SEMS Standardized Emergency Management System
SEMS Standard Embarkation Management System (US DoD)
SEMS Steel Enterprise Management System (Steelman)
SEMS Screw and Washer Assemblies (SAWA would have made more sense)
SEMS Student Emergency Medical Services (various universities)
SEMS Support Enforcement Management System (Washington State child support enforcement system)
SEMS Software Engineering Management System
SEMS Space Environment Monitor System
SEMS Safety & Environmental Management System
SEMS Semicarbazide
SEMS Security Event Management System
SEMS System Engineering Master Schedule
SEMS Support Equipment Management System
SEMS Stud Elongation Measurement System
SEMS Standard machine screw with lock washer (SMSWLC seems more appropriate)
SEMS Standard Embarkation Data System
SEMS Shared Extended Memory Segment
SEMS Ship/Submarine Environment & Missile Simulation (Tomahawk missile simulation used by the US Navy)
SEMS Scott Emergency Management System
SEMS Special Education Master of Science

[Mike_B]

Should these bolts be a "washer head" or not? The link in my previous post is a washer head...

Mike B

[RonD2]

Hi Mike,
I don't think we'll know if washer head is correct until we see an original survivor from a M38.

I searched their web site and it appears that washer head is the only kind they have with internal tooth lock washers in that style and size.

They have some regular hex heads listed, but only with external tooth lock washers.

Unless they're not listed. Would have to call them to find out.