Metering-box security-screw RFQs fail when a generic tamper-proof label replaces drive-family identification from the controlled drawing and tool-access evidence.
Start from the metering-box or cover revision that shows the security recess, the drive-family callout if present, and who accepts tool-to-recess fit. A metering-box security-screw product page helps locate a route; it does not decide whether the next build uses pin-hex, spanner, tri-wing, or another family.
Keep confirmed drive-family notes separate from open tool-inventory questions so a prior lead-seal or break-off screw is not mistaken for the next drive package.
Record drive family, recess evidence, service-tool access, and acceptance ownership as discrete fields.
| Drive-family RFQ field | What to record | Send with quote |
|---|---|---|
| Metering-box revision | Drawing controlling the security-screw location | Yes |
| Drive-family callout | Named security drive family shown on the drawing | Yes |
| Recess / tip evidence | Photo or extract of the intended recess tied to revision | Yes |
| Service-tool access | Path for authorized driver during install or reseal | Yes |
| Drive acceptance owner | Who confirms family and tool fit for quotation | Yes |
Do not invent security performance, break-off torque, or seal-wire claims to fill blanks.
A sample can show which driver tip seats in one observed recess. It cannot invent a missing drive-family callout or prove that a different cover uses the same family. Photograph tip seating against the recess, mark observations to the revision, and list unverified family names.
If the sample conflicts with the drawing family note, escalate to the drawing owner before releasing a purchase description.
Give every supplier the same revision, drive-family fields, quantities, destination, and open points. When family identification is incomplete, keep the field open instead of allowing each quote to assume a different security drive.
Record supplier alternatives beside the drive-family question they answer so comparisons stay auditable.
Important: Do not release a purchase description for tamper-proof security screw drive family RFQ when the controlling drawing, interface, or approval owner is still open; keep misfit risk visible in the RFQ. — Source: ISO standards catalogue.
This RFQ guide does not establish tamper resistance, unauthorized-access delay, torque capacity, corrosion behavior, sealing integrity, certification, or lifecycle. Those outcomes require product-specific evidence and the validation path chosen by the metering-box owner.
Fit Boundary: pause when drive-family callout, recess evidence, service-tool access, or acceptance ownership is unclear. Resolve those inputs before treating a security screw route as a selection answer.
After drive-family fields are assembled, use the TNHO tamper-proof security screws for metering boxes as a navigation starting point. The page confirms TNHO publishes a tamper-proof security screw route for metering boxes; it does not replace the drawing or establish unlisted drive families, materials, torque values, or lead times.
Send with quote / RFQ bullets:
– Metering-box revision and drive-family callout
– Recess or tip evidence and service-tool access notes
– Quantities, destination, and labeled open points
– Acceptance owner for any supplier alternative
For the next step, send the controlled drawing and RFQ inputs. For security-screw navigation, open TNHO products then continue with Electrical Fasteners: Some Basic Information.
Confirm the metering-box revision, drive-family callout, recess evidence, and acceptance owner.
No. The controlled drawing must name or show the security drive family.
Include revision, drive-family and recess fields, tool access, quantities, destination, and open points.
No. Performance and compliance need project-specific evidence.
Pause when drive family, recess evidence, tool access, or ownership is unclear.
Use the verified tamper-proof security screw route with the controlled drive-family package.
TNHO 
